Home / 755,212.79-1,042,115.10-428,421.69

Finding the Fourth Proportional to 755,212.79, 1,042,115.10 and 428,421.69

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Solution

The fourth proportional to 755,212.79, 1,042,115.10 and 428,421.69 is: 591,177.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    755,212.79 : 1,042,115.10 = 428,421.69 : x
  2. Step 2: Convert to fraction form
    755,212.79/1,042,115.10 = 428,421.69/x
  3. Step 3: Cross multiply
    755,212.79x = 1,042,115.10 × 428,421.69
  4. Step 4: Simplify right side
    755,212.79x = 446,464,712,316.52
  5. Step 5: Solve for x
    x = 446,464,712,316.52/755,212.79
  6. Step 6: Final answer
    x = 591,177.38

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.